Flyback Power Converter Energy-Saving Control Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Flyback power supply systems, the operation of the IC results in power loss due to the low-frequency part of the energy signal being longer than the high-frequency part, leading to inefficient energy usage.
Innovation Solution
An energy-saving control device is introduced that connects with an IC and a transformer, monitoring the ratio of the low-frequency to high-frequency parts of the energy signal to determine when to put the IC into sleep mode, thereby conserving energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the IC continues to operate during the low-frequency part of the energy signal, then the IC can respond to any potential power needs, but power loss increases due to unnecessary idle operation
Solution Approach 1:
The control device periodically monitors the energy signal characteristics and alternates the IC between active and sleep modes based on the detected frequency ratio. During high-frequency periods when power is being discharged, the IC remains active. During extended low-frequency periods when no power is discharged, the IC enters sleep mode to conserve energy, thus applying periodic action to resolve the contradiction between operational readiness and energy consumption.
2Speed
If the IC is kept in active mode continuously, then immediate response to power needs is ensured, but energy efficiency deteriorates during periods when transformer energy is fully discharged
Solution Approach 1:
The control device implements a feedback mechanism by continuously monitoring the energy signal from the transformer and detecting the ratio of low-frequency to high-frequency components. Based on this feedback information, the device automatically adjusts the IC's operational state - keeping it active when high-frequency components indicate ongoing power discharge, and transitioning it to sleep mode when low-frequency dominance indicates complete discharge, thus optimizing both response speed and energy consumption through closed-loop control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The control device effectively reduces energy consumption by determining when to activate or deactivate the IC based on the energy signal ratio, ensuring efficient energy usage by minimizing idle operation.
Implementation Method 1
a parasitic drain-to-source capacitor inherent in the NMOSFET stores the energy from the voltage VD
Implementation Method 2
The primary winding PW and the parasitic drain-to-source capacitor along with parasitic elements on the secondary winding create a resonant tank with a resonant frequency fR. While resonating, energy flows back and forth between the primary winding PW and the parasitic drain-to-source capacitor.
Implementation Method 3
a power converter circuit includes a transformer 10 having a primary winding PW and a secondary winding SW... control the transfer of power from the primary winding PW to the secondary winding SW
Data Source
AI summary
An energy-saving control device is disclosed. The control device is connected with an integrated circuit (IC) and a secondary winding of a transformer of a power converter. A primary winding of the transformer receives energy, and then the energy is discharged from the secondary winding and an energy signal of the energy is generated. And the energy signal comprises a high-frequency part and a low-frequency part thereafter. The energy signal is received by the energy-saving control device to control the operation of the IC according to a ratio of the low-frequency part to the high-frequency part.